Steam engine or pump



(No Model.) 2 Sheets-Sheet 1..

me. SALMoN. STEAM ENGINE 0R PUMP.

No. 347,644. Patented 411g. 17, 188e.

* 2 Sheets-Sheet 2. W. C. SALMON.

STEAM ENGINE 0RA PUMP.

(No Model.)

Patented Aug. 17, 1886.

N. FETERs. PhnioLnhugrapher, wnmlnglon, ILC4 UNITED STATI-3s PATENTOFFICE.

WILLIAM GUTTER SALMON, OF PORTLAND, OREGON.

STEAM ENGINE 0R PUMP.

SPECIFICATION forming part of Letters Patent No. 347,644, dated August17, 1888.

Application tiled March 17, 1886. Serial No. 195,518. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM CUTTER. SAL- MON, a citizen of the UnitedStates, residing at Portland, in the county of Multnomah and State ofOregon, haveinvented certain new and useful Improvements in SteamEngines or Pumps; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to thean-V nexed drawings, making a part of this speciication, and to theletters and figures of reference marked thereon.

Figure 1 of the drawings is a vertical horizontal section. Fig. '2 is aside elevation of a pair of the pistons. Fig. 3is a longitudinalhorizontal section showing four cylinders reduced in diameter to permitthe eccentrics to be placed together upon the shaft. Figs. 4, 5, and 6are views of the eccentric in different positions with relation to thepiston; and Fig. 7, a view of a set of puppet-valves that maybe used assteam-valves, or when the en gine is converted into a pump.

The present invention is an improvement upon that shown in my Patent No.333,675, granted January 5, 1886, and has for its oblject to providebetter Vmeans for the bearingsurface between the eccentrics and thepistons, whereby the eccentricsl are caused to wear true and with lessfriction.

In the accompanying drawings, A represents the casing', in which theouter portions, a, in which the pistons work, are made round. This Iaccomplish by placing a division-piece, B, between the two pistons, ingrooves b in the upper and lower and at the end of the casing. Thisdivision-piece is concave on each side, conforming to the shape of thepistons. In other words, it is putin place and bored out the same as anycylinder, it forming one side of the cylinder and the casing the other.The side of the casing is removable, as shown in my former patent, forassembling the parts. lThis is not important, as I do not claim it here.The heads C of the cylinders are provided each with a groove or recess,d, to still further secure the division-piece.

Upon the outside of the cylinder-heads are steam-chests D, eachcontaining an oscillating valve7 c, for admitting and exhausting steamfrom the cylinders. These valves could be operated by a Valve-gear whenthe engine is converted into a pump, which is done by applying power tothe shaft lto operate the pistons; but I have shown a setofpuppet-valves for the pump that would operate by the action of thewater. These valves are shown in Fig. 7, E being the inlet-valve, and Ethe outlet, the stems of which pass through the standard e and areprovided with springs s, 6o which prevent them from remaining open ifthey should move too far.

About midway of the standard and around the stem is'an oil-chamber, o,for lubricating the valve-stem. f

The pistons P are connected together by the yoke F, which has a bearingupon the top and bottom of the casing, and also upon one side.

There being two sets of pistons, the inside of the yokes bear againstone another, all Inoving freely, but kept in position without any unduefriction. Within the yokes, back of the pistons, are dovetailed platesG, of suitable material, each provided with pins g, projectingtherefrom. The plates are made removable, as it is necessary that itshould be constructed of some hard metal, to guard against wear, andalso to prevent the pins from working loose. Supported upon these pinsare shoes H, that conform tothe contour of so the eccentrics I, theshoes being provided with holes h, for the reception of the pins.

` In operation, as the eccentrics revolve, the shoes are rocked upon theplates G, and are supported alternately upon two or more of the pins.

When the shoes or eccentrics are worn, new shoes can be readily put intheir place, and the eccentric can wear considerably before beingreplaced. o

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a steam-engine, the combination of the four pistons, rigidlyconnected in pairs, the casing, and the removable division-piece formingthe partition between the two cylinders, substantially as shown anddescribed.

2. The combination of the yoke with the eccentric, the curved shoes incontact with the 10o eccentric, and provided with recesses, and theplate provided with pins, substantially as Shown and described.

3. The combination of the eccentric with the yoke, the shoes, and theplate provided with the pins, al1 substantially as shown and described.

4. The combination of the eccentric with tbe yoke, the pistons, theshoes, and the plate provided with the pins, all substantially as Ioshown and described.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

WILLIAM CUTTER SALMON. TVitnesses:

WILLIAM J. BEoANNEN, CHARLES G. Sona-unir.

